After arriving at this picture, everyone will definitely say that this is not the light-emitting diode in the analog e-book. Yes, you are right. LED lights are light-emitting diodes. Now what we see is the circuit symbol of LED, which is not the true face of Lushan. Please see the picture below.

Is it a lot taller in one go? The colors and shapes are different and all kinds. For so many LED lights, it is necessary to classify them at this time, otherwise the brain is too difficult to remember.

According to its color, LED can be divided into:

Red, green, blue, yellow, white, etc.

LED according to its package can be divided into:

In-line

In-line LED lights can be divided into cylindrical, flat, and special-shaped according to their shape.

Straight-insertion cylindrical LED lamps can be divided into straight-insertion 3mm and straight-insertion 5mm according to the diameter of their lamp beads.

Patch

SMD packages are 0603, 0805, 1206, 2835, etc.

According to its turn-on voltage and turn-on current, LEDs can be divided into:

High-power LED lights (usually used for lighting)

Low-power LED light (usually used for power indicator or running indicator of circuit board)